The skillful method of planting pear trees to treat the beetles

Pears are one of the most common fruits in our lives, especially in autumn and winter. Pears have the effect of clearing the lungs. Eating pears in autumn and winter is very effective in preventing colds and coughs. But for planting friends, it is very important for fruit trees to prevent pests.

The skillful method of planting pear trees to treat the beetles

The beetles on pear trees can be controlled by the combination of artificial capture and chemical control.

1. Make use of the fake death of the beetle, shake the branches in the early morning or evening and shake down the beetle on the tree to hunt and kill.

2. In the pear orchard where the occurrence of the beetle is serious, spraying the orchard ground and crown with 1500 times liquid of Nongdile or 1000 times liquid of phoxim or 2000 times liquid of permethrin in the evening has a significant effect on controlling the damage of the beetle.

Planting environment of pear trees

1. Temperature conditions: pear trees like temperature, need higher temperature for growth, and need a certain low temperature during dormancy. The suitable annual average temperature for Qiuzi pear, white pear and western pear is about 4-12 ℃, 7-15 ℃ for white pear and western pear, and 13-21 ℃ for sand pear.

2. Light conditions: pear trees are light-loving fruit trees, the annual sunshine is between 1600 and 1700 hours, the light compensation point of pear leaves is about 1100 lux, and the light saturation point is about 54000 lux.

3. Water conditions: pear trees require more water, the transpiration coefficient is 284-401, and the transpiration water per square meter is about 40 grams, which is less than 10 grams, which can cause injury. Qiuzi pears, white pears and western pears have poor moisture tolerance. Sand pears have strong moisture tolerance. In sandy loam, when the soil water content is 15-20%, it is suitable for root growth, and when it decreases to 12%, the root growth is inhibited.

4. Soil conditions: pear trees have strong adaptability to soil, and the sandy loam with deep soil layer, loose soil, good water permeability and water retention and low groundwater level is the most suitable. It has wide adaptability to soil acid and alkali, and the pH value can grow normally in the range of 5-8.5. PH5.8-7 is the most suitable and has strong salt and alkali tolerance. When the soil salt content is less than 0.2%, the soil salt content grows normally and exceeds 0.3%. The root growth was damaged and the growth was obviously poor.

Control measures of Diseases and insect pests in Pear trees

Pear orchard diseases and insect pests are also one of the very important aspects, in addition to recording the types and hazards of diseases and insect pests, as well as the types, doses, times and techniques of the use of pesticides. How to make rational use of pesticides plays an important role in the prevention and control of diseases and insect pests.

First of all, prescribe the right medicine to the case. Select the most suitable varieties of pesticides to control every kind of diseases and insect pests. Different bacteria and insects respond differently to the toxicity of the same drug. In other words, each pesticide has its own control scope and object, such as strychnine can effectively control pear rust and powdery mildew, but the control effect on scab and other diseases is very poor. Imidacloprid has a significant effect on controlling aphids and planthoppers in piercing mouthparts, but it has no effect on mites. Deltamethrin has a good effect on the control of pear heart borer, aphids, pear planthopper and all kinds of caterpillars, but not on mites.

In addition, there were differences in sensitivity to pesticides in different periods of the disease infection process. At the stage of sprouting and invading pear trees, the spores of pathogens are more sensitive to insecticides, and the control effect is better; when the pathogens have invaded the fruit trees and established a parasitic relationship, and the fungi develop into hyphae, the drug resistance is enhanced and the control effect becomes worse. after growing into a fruiting body, it is more difficult to control, such as pear rust. Therefore, the prevention and control of diseases should be mastered before or at the initial stage of the disease.

Nutritional value of Pear

Per 100g pear contains 44 calories, 0.4 grams of protein, 0.2 grams of fat, 13.3 grams of carbohydrates, 3.1 grams of dietary fiber, micrograms of vitamin A6, 33 micrograms of carotene, 0.09 milligrams of vitamin B, 0.3 milligrams of nicotinic acid, 0.3 milligrams of vitamin C6, 1.34 milligrams of vitamin E, 9 milligrams of calcium, 14 milligrams of phosphorus, 92 milligrams of potassium, 2.1 milligrams of sodium, 8 milligrams of magnesium, Iron 0.5 mg, zinc 0.46 mg, iodine 0.7 mg, selenium 1.14 mg, copper 0.62 mg, manganese 0.07 mg.

1. Pear pulp is rich in organic acids such as pulp, glucose and malic acid, as well as protein, fat, calcium, phosphorus, iron, carotene, vitamin B1, vitamin B2, nicotinic acid, ascorbic acid and other vitamins.

2. The fresh pear has a water content of 83%, and its calories are slightly lower than those of apples, and its main source of calories is carbohydrates.

Pears are very nutritious, and the price on the market is relatively cheap, so pears are very popular. But if fruit growers want to increase the yield of pears, it is very important for the prevention and treatment of pests.